Custom Product Builder check out experiece

I am looking for a custom check out experience where the visitors can select their parameters and a price will be configured. split sreen. Left side displays chose package with badge and features. Right side displays variable parameters. Footer/Lowest row displays all packages from least $ to Most $ and can be scrolled. -As parameters are changed the L side display changes accordingly -I enter the parameters for them to choose from. -looking for a stand alone solution that I can use with multiple websites all with different parameters customers can choose -features- some features can be increased or decreased if it is amount based. example 5 websites, or $1500 or 15 directories- increase/decrease will change displayed package -can put this on any page -can upload package images or input package names and it will type over badge -ability to select badge image or upload custom image per package or as default for all packages offered in that cart -ability to add features -input equity scale -input term length -as parameters adjusted ( using sliders and/or +/-) the price adjusts --- 2nd sale checkout- once parameters are chosen and click checkout, offered discount to upgrade or continue with checkout --- show total due. last option to prepay- offer discounts based on term. Would you like a discount. discount % slider. as slides prepayment amount increases